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Zhang Z, Xing J, Tang X, Sheng X, Chi H, Zhan W. Nectin1 is a pivotal host factor involved in attachment and entry of red-spotted grouper nervous necrosis virus in the early stages of the viral life cycle. J Virol 2024; 98:e0090124. [PMID: 39194240 PMCID: PMC11406929 DOI: 10.1128/jvi.00901-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/30/2024] [Indexed: 08/29/2024] Open
Abstract
Nervous necrosis virus (NNV) is a highly neurotropic virus that poses a persistent threat to the survival of multiple fish species. However, its inimitable neuropathogenesis remains largely elusive. To rummage potential partners germane to the nervous system, we investigated the interaction between red-spotted grouper NNV (RGNNV) and grouper brain by immunoprecipitation coupled with mass spectrometry and discerned Nectin1 as a novel host factor subtly involved in viral early invasion events. Nectin1 was abundant in neural tissues and implicated in the inception of tunnel nanotubes triggered by RGNNV. Its overexpression not only dramatically potentiated the replication dynamics of RGNNV in susceptible cells, but also empowered non-sensitive cells to expeditiously capture free virions within 2 min. This potency was impervious to low temperatures but was dose-dependently suppressed by soluble protein or specific antibody of Nectin1 ectodomain, indicating Nectin1 as an attachment receptor for RGNNV. Mechanistically, efficient hijacking of virions by Nectin1 strictly depended on intricate linkages to different modules of viral capsid protein, especially the direct binding between the IgC1 loop and P-domain. More strikingly, despite abortive proliferation in Nectin1-reconstructed CHSE-214 cells, a non-sensitive cell, RGNNV could gain access to the intracellular compartment by capitalizing on Nectin1, thereby inducing canonical cytoplasmic vacuolation. Altogether, our findings delineate a candidate entrance for RGNNV infiltration into the nervous system, which may shed unprecedented insights into the exploration and elucidation of RGNNV pathogenesis.IMPORTANCENervous necrosis virus (NNV) is one of the most virulent pathogens in the aquaculture industry, which inflicts catastrophic damage to ecology, environment, and economy annually around the world. Nevertheless, its idiosyncratic invasion and latency mechanisms pose enormous hardships to epidemic prevention and control. In this study, deploying grouper brain as a natural screening library, a single-transmembrane glycoprotein, Nectin1, was first identified as an emergent functional receptor for red-spotted grouper NNV (RGNNV) that widely allocated in nervous tissues and directly interacted with viral capsid protein through distinct Ig-like loops to bridge virus-host crosstalk, apprehend free virions, and concomitantly propel viral entry. Our findings illuminate the critical role of Nectin1 in RGNNV attachment and entry and provide a potential target for future clinical intervention strategies in the therapeutic race against RGNNV.
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Affiliation(s)
- Zhiqi Zhang
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Khaled AA, Shabaan AM, Hammad SM, Hafez EE, Saleh AA. Exploring the impact of nano-Se and nano-clay feed supplements on interleukin genes, immunity and growth rate in European Sea Bass (Dicentrarchus labrax). Sci Rep 2024; 14:2631. [PMID: 38302608 PMCID: PMC10834503 DOI: 10.1038/s41598-024-53274-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 01/30/2024] [Indexed: 02/03/2024] Open
Abstract
This study aimed to investigate the effects of adding Nano-Selenium (NSe) and Nano-clay (NC) as feed supplements on European Sea Bass (Dicentrarchus labrax). Two separate experiments were conducted, one with NC and the other with NSe. Each experiment consisted of four sub-groups with varying concentrations of NC or NSe. The expression levels of five immune-related genes (TNF-α, TNF-β, IL-2, IL-6 and IL-12) were measured using Real-time Quantitative PCR (Rt-PCR) Assay. The results showed an increase in the expression of interleukins (IL-2, IL-6 and IL-12) and pro-inflammatory cytokines (TNF-α and TNF-β) after exposure to NC and NSe. TNF-α gene expression was significantly higher with both 1 mg and 10 mg concentrations of NC and NSe. TNF-β gene expression was highest with the 5 mg concentration of NC. The concentrations of 1 mg and 10 mg for NC, and 1 mg, 5 mg, and 10 mg for NSe, led to the highest (p < 0.05) levels of IL-2 expression compared to the control. Similar trends were observed for IL-6 and IL-12 gene expression. Understanding the impact of these concentrations on gene expression, growth rate, biochemical indices, and antioxidant status can provide valuable insights into the potential applications of NC and NSe supplements on European Sea Bass.
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Affiliation(s)
- Asmaa A Khaled
- Animal and Fish Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria City, 21531, Egypt
| | - Amany M Shabaan
- Chemistry Department, Biochemistry Division, Faculty of Science, El-Fayoum University, El-Fayoum, Egypt
| | - Saad M Hammad
- Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, New Borg El Arab, Alexandria, 21934, Egypt
| | - Elsayed E Hafez
- Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, New Borg El Arab, Alexandria, 21934, Egypt
| | - Ahmed A Saleh
- Animal and Fish Production Department, Faculty of Agriculture (Alshatby), Alexandria University, Alexandria City, 11865, Egypt.
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Xing J, An Z, Tang X, Sheng X, Chi H, Zhan W. Expression and Immune Characterization of Major Histocompatibility Complex in Paralichthys olivaceus after Antigen Stimulation. BIOLOGY 2023; 12:1464. [PMID: 38132290 PMCID: PMC10741117 DOI: 10.3390/biology12121464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/18/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023]
Abstract
The Major histocompatibility complex (Mhc) is an important molecule for antigen presenting and binds to T cell receptors, activating T lymphocytes and triggering specific immune responses. To investigate the role of MhcII in adaptive immunity, in this study, mhcIIα and mhcIIβ of flounder (Paralichthys olivaceus) were cloned, polyclonal antibodies (Abs) against their extracellular regions were produced, respectively, and their distribution on cells and tissues and expression patterns, which varied by antigen stimulation or pathogen infection, were investigated. The results showed that the open reading frame (ORF) of mhcIIα is 708 bp, including 235 amino acids (aa); and the ORF of mhcIIβ is 741 bp, encoding 246aa. The mhcIIα and mhcIIβ were significantly expressed in gills, spleen, and peripheral blood leukocytes (PBLs). Their antibodies could specifically recognize eukaryotic expressed MhcIIα and MhcIIβ. MhcIIα+ and MhcIIβ+ cells were 30.2 ± 2.9% of the percentage in peripheral blood leukocytes. MhcII molecules were co-localized with CD83 and IgM on leukocytes, respectively, but not on CD4+ or CD8+ T lymphocyte subpopulations. The expression of both mhcIIα and mhcIIβ were significantly upregulated in flounder after bacteria and virus challenges. The percentages of MhcII+ cells, MhcII+/CD83+, and MhcII+/IgM+ double-positive cells increased significantly after PHA and ConA stimulation, respectively; they varied significantly in PBLs after polyI:C stimulation, and no variations were found after LPS treatment. In the meantime, variations in MhcII+ cells were consistent with that of CD4+ T lymphocytes. These results suggest that MhcII, mainly expressed in B cells and dendritic cells, play an essential role in antigen presentation, and respond significantly to exogenous antigens and T cell-dependent antigens. These results may provide an important reference for the study of cellular immunity in teleosts.
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Affiliation(s)
- Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Zhaoxia An
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
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Ogawa N, Yomota M, Notsu M, Kanasaki K. Progressive Thymic Hyperplasia With Graves' Disease: A Case Report. Cureus 2023; 15:e43950. [PMID: 37746349 PMCID: PMC10514368 DOI: 10.7759/cureus.43950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2023] [Indexed: 09/26/2023] Open
Abstract
We treated a 36-year-old man with thymic hyperplasia complicated with Graves' disease. Thymic hyperplasia was observed on thoracic computed tomography (CT) three months after the onset of thyrotoxicosis symptoms. One month after thiamazole initiation, he displayed drug-induced liver injury and underwent a total thyroidectomy. Seven months after surgery, we observed a dramatic reduction of thymic size associated with normalizing the soluble interleukin-2 receptor (sIL-2R) levels. The rapid development of hyperplasia after the onset of thyrotoxicosis and the restoration in thymus volume after total thyroidectomy associated with suppression of sIL-2R, in this case, suggests the complexity of the pathogenesis of thymic hyperplasia in the thyrotoxicosis.
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Affiliation(s)
- Noriko Ogawa
- Division of Endocrinology and Metabolism, Shimane University Faculty of Medicine, Izumo, JPN
| | - Miwako Yomota
- Division of Endocrinology and Metabolism, Shimane University Faculty of Medicine, Izumo, JPN
| | - Masakazu Notsu
- Division of Endocrinology and Metabolism, Shimane University Faculty of Medicine, Izumo, JPN
| | - Keizo Kanasaki
- Division of Endocrinology and Metabolism, Shimane University Faculty of Medicine, Izumo, JPN
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Tian H, Xing J, Tang X, Sheng X, Chi H, Zhan W. Cytokine networks provide sufficient evidence for the differentiation of CD4 + T cells in teleost fish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 141:104627. [PMID: 36587713 DOI: 10.1016/j.dci.2022.104627] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
Cytokines, a class of small molecular proteins with a wide range of biological activities, are secreted mainly by immune cells and function by binding to the corresponding receptors to regulate cell growth, differentiation and effects. CD4+ T cells can be defined into different lineages based on the unique set of signature cytokines and transcription factors, including helper T cells (Th1, Th2, Th17) and regulatory T cells (Treg). In teleost, CD4+ T cells have been identified in a variety of fish species, thought to play roles as Th cells, and shown to be involved in the immune response following specific antigen stimulation. With the update of sequencing technologies, a variety of cytokines and transcription factors capable of characterizing CD4+ T cell subsets also have been described in fish, including hallmark cytokines such as IFN-γ, TNF-α, IL-4, IL-17, IL-10, TGF-β and unique transcription factors such as T-bet, GATA3, RORγt, and Foxp3. Hence, there is increasing evidence that the subpopulation of Th and Treg cells present in mammals may also exist in teleost fish. However, the differentiation, plasticity and precise roles of Th cell subsets in mammals remain controversial. Research on the identification and differentiation of fish Th cells is still in its infancy and requires more significant effort. Here we will review recent research advances in characterizing the differentiation of fish CD4+ T cells by cytokines and transcription factors, mainly including the identification of Th and Treg cell hallmark cytokines and transcription factors, the regulatory role of cytokines on Th cell differentiation, and the function of Th and Treg cells in the immune response. The primary purpose of this review is to deepen our understanding of cytokine networks in characterizing the differentiation of CD4+ T cells in teleost.
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Affiliation(s)
- Hongfei Tian
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Fisheries College, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
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Tian H, Xing J, Tang X, Sheng X, Chi H, Zhan W. Interactions of interleukin 2 (IL-2) and IL-2 receptors mediate the activities of B lymphocytes in flounder (Paralichthys olivaceus). Int J Biol Macromol 2023; 227:113-123. [PMID: 36539171 DOI: 10.1016/j.ijbiomac.2022.12.135] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Interleukin 2 (IL-2) is an immunoregulatory cytokine that plays significant role in the activation and proliferation of immune cells. In teleost, the functions of IL-2 signaling on the proliferation and differentiation of T lymphocytes were well documented. However, there is still unclear about the effects of IL-2 signaling on B cell immunity in fish. Hence, in this study, full-length transcriptome sequencing was performed to investigate the activation of IL-2 on flounder (Paralichthys olivaceus) lymphocytes in vitro, the effects of IL-2 on the immunity of B cells after its receptors (IL-2Rβ or IL-2Rγ) blocked were further investigated. The results shown that the differentially expressed genes in lymphocytes after IL-2 stimulation were annotated to the pathways related to the immune response of B cells. The percentages of mIgM+ B cells were increased, and the capacities of antibody secretion and phagocytosis of B cells were enhanced after IL-2 stimulation. However, the function of IL-2 on B lymphocytes immunity was significantly inhibited after IL-2 receptors were blocked, especially after IL-2Rβ was blocked. Collectively, we can conclude that IL-2 is able to promote the proliferation of B lymphocytes, antibody secretion, and enhance their phagocytosis in flounder, and these effects are mediated through IL-2/IL-2R signaling.
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Affiliation(s)
- Hongfei Tian
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
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Mu P, Teng Y, Wu H, Li X, Huo J, Ao J, Chen X. Large yellow croaker (Lrimichthys crocea) IL-2 modulates humoral immunity via the conserved JAK-STAT5 signal pathway. FISH & SHELLFISH IMMUNOLOGY 2023; 133:108519. [PMID: 36608811 DOI: 10.1016/j.fsi.2023.108519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/29/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
The terminal differentiation of B cells into plasma cells is central to the generation of protective, long-lived humoral immune responses. In mammals, interleukin-2 (IL-2) has been shown to play a role in B cell proliferation and differentiation. However, it remains unclear whether fish IL-2 is involved in B cell proliferation and differentiation. To this end, we investigated the regulatory role of IL-2 in B cell proliferation and differentiation in large yellow croaker (Larimichthys crocea). We found that L. crocea IL-2 (LcIL-2) significantly increased IgM+ B cells proliferation both in vivo and in vitro and facilitated IgM+ B cells differentiation into plasma cells. Furthermore, LcIL-2 increased the production of specific antibodies after immunization with the Vibrio alginolyticus subunit vaccine, recombinant dihydrolipoamide dehydrogenase (rDLD); simultaneous administration of LcIL-2 and rDLD prior to challenge with Vibrio parahaemolyticus or V. alginolyticus significantly increased relative percent survival. Mechanistically, LcIL-2 promoted B cell proliferation and regulated B cell differentiation by triggering the JAK-STAT5 signaling pathway. Collectively, our results demonstrated that LcIL-2 improved B cell proliferation and specific antibody production via the conserved JAK-STAT5 signaling pathway in large yellow croaker, providing valuable insights into the mechanisms underlying the IL-2-mediated regulation of the humoral immune response in fish.
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Affiliation(s)
- Pengfei Mu
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yan Teng
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Hanyu Wu
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xinran Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jieying Huo
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jingqun Ao
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Xinhua Chen
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China.
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